CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Revenue:
Rental and other income	$ 428,022		$ 386,175		$ 1,236,154		$ 1,060,554
Management, development and other fees	2,503		3,014		8,253		8,198
Total revenue	430,525		389,189		1,244,407		1,068,752
Expenses:
Operating expenses, excluding property taxes	105,212		96,857		304,812		256,549
Property taxes	44,996		42,184		131,920		115,096
Interest expense, net	46,376	[1]	43,945	[1]	132,631	[1]	127,772	[1]
Loss on extinguishment of debt, net	0		0		412		0
Gain (Loss) on Interest Rate Fair Value Hedge Ineffectiveness	0		53,484		0		51,000
Depreciation expense	111,836	[1]	159,873	[1]	328,598	[1]	455,410	[1]
General and administrative expense	11,290		9,878		30,745		31,262
Expensed Acquisition Development and Other Pursuit Costs	406		2,176		3,139		46,041
Total expenses	320,116		408,397		932,257		1,083,130
Equity in income (loss) of unconsolidated real estate entities	130,592		3,260		143,527		(16,244)
Gain on sale of land	0		0		0		240
Gain on sale of communities	0		0		60,945		0
Income (loss) from continuing operations	241,001		(15,948)		516,622		(30,382)
Discontinued operations:
Income from discontinued operations	0		5,063		310		12,890
Gain on sale of discontinued operations	0		0		37,869		118,173
Total discontinued operations	0		5,063		38,179		131,063
Net income	241,001		(10,885)		554,801		100,681
Net loss (income) attributable to noncontrolling interests	99		170		(13,872)		248
Net income attributable to common stockholders	241,100		(10,715)		540,929		100,929
Other comprehensive income:
Cash flow hedge losses reclassified to earnings	1,546		54,948		4,557		57,913
Comprehensive income	$ 242,646		$ 44,233		$ 545,486		$ 158,842
Earnings per common share - basic:
Income (loss) from continuing operations attributable to common stockholders (in dollars per share)	$ 1.83		$ (0.12)		$ 3.86		$ (0.24)
Discontinued operations attributable to common stockholders (in dollars per share)	$ 0.00		$ 0.04		$ 0.29		$ 1.04
Net income attributable to common stockholders (in dollars per share)	$ 1.83		$ (0.08)		$ 4.15		$ 0.80
Earnings per common share - diluted:
Income (loss) from continuing operations attributable to common stockholders (in dollars per share)	$ 1.83		$ (0.12)		$ 3.85		$ (0.24)
Discontinued operations attributable to common stockholders (in dollars per share)	$ 0.00		$ 0.04		$ 0.29		$ 1.04
Net income attributable to common stockholders (in dollars per share)	$ 1.83		$ (0.08)		$ 4.14		$ 0.80
Dividends per common share: (in dollars per share)	$ 1.16		$ 1.07		$ 3.48		$ 3.21

[1] Includes amounts associated with assets sold or held for sale, not classified as discontinued operations.